Ever since i gotten my 3 3D Printers, My Mother in-law asked me to make her something.
this may be strange but she tells me she can't pee in a boat when her and her new Boyfriend go fishing, so she went out and bought a Hospital urine Container. the only problem it didn't come with a cover and she says when she does use it, it spills, so i was asked to make a cover for it.
You will see several Version in this design. But all work.
Final Version is a thicker wall for better seal and better grip, along with a ticker wall I've added a curved channel inside so it sits on the container with out sliding or rotating.
I Hope you find this design useful.